Definition of "valve" []

  • Anatomy A membranous structure in a hollow organ or passage, as in an artery or vein, that folds or closes to prevent the return flow of the body fluid passing through it. (noun)
  • Any of various devices that regulate the flow of gases, liquids, or loose materials through piping or through apertures by opening, closing, or obstructing ports or passageways. (noun)
  • The movable control element of such a device. (noun)
  • Music A device in a brass wind instrument that permits change in pitch by a rapid varying of the air column in a tube. (noun)
  • Biology One of the paired, hinged shells of certain mollusks and of brachiopods. (noun)
  • Any device that shuts off, starts, regulates, or controls the flow of a fluid (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • A flaplike structure in a hollow organ, such as the heart, that controls the one-way passage of fluid through that organ (noun)
  • An evacuated electron tube containing a cathode, anode, and, usually, one or more additional control electrodes. When a positive potential is applied to the anode, electrons emitted from the cathode are attracted to the anode, constituting a flow of current which can be controlled by a voltage applied to the grid to produce amplification, oscillation, etc (noun)
  • Any of the separable pieces that make up the shell of a mollusc (noun)
  • A device on some brass instruments by which the effective length of the tube may be varied to enable a chromatic scale to be produced (noun)
  • Any of the several parts that make up a dry dehiscent fruit, esp a capsule (noun)
  • Either of the two halves of a diatom cell wall (noun)
  • A leaf of a double door or of a folding door (noun) (c) HarperCollins Publishers Ltd 2016

Use "valve" in a sentence
  • "When we open the valve from the tinaco to let water into our plumbing system, water comes spouting out of the top of this pipe like a fountain."
  • "What a pain, removing gas tank cover, gas tank, tank shield for a ten min valve adjustment."
  • "They repeat it over-and-over-and-over, elevating anxiety against the Democrats, so that the relief valve is to choose Republicans."